JP5898324B2 - 改良型hcvワクチンおよびその使用方法 - Google Patents
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Description
実施例
pConNS4B、pConNS5AおよびpConNS5Bの設計および発現
HCVタンパク質NS4B、NS5A、およびNS5BのHCV遺伝子型1aコンセンサス配列を、ロスアラモス国立研究所のHCV配列データベースから得た170の異なる配列から生成した。その後、これらの発現および検出を高めるために、各構築物のC末端にIgEリーダー配列を加えかつN末端にHA−タグを加えることを含むいくつかの改変をこのコンセンサス構築物に対して行った。さらに、各構築物を、GeneOptimizer(商標)(GENEART、ドイツ)を使用してコドンおよびRNAの最適化を介してさらに改変し、CMVプロモーターの制御下で臨床発現ベクターpVAXにサブクローニングした。最終的な構築物を、pConNS4B、pConNS5AおよびpConNS5Bと名付けた(プラスミドマップを、図8A〜図8Cに示す)。
pConNS4B、pConNS5AおよびpConNS5Bを用いたC57BL/6マウスの免疫は、強力な細胞免疫反応を誘導する
本構築物の発現を確認した後、本構築物の免疫原性を判定するために、C57BL/6マウスを免疫した。生後6〜8週間のメスのC57BL/6マウスをJackson Laboratoriesから購入し、国立衛生研究所およびペンシルバニア大学の研究機関の動物管理および使用委員会(Institutional Care and Use Committee)(IAUCUC)のガイドラインにしたがって飼育した。動物を、群あたり5匹とし、各構築物の3つの異なる用量群に分けた。この動物を、5μg、12、5μg、または25μgいずれかのpConNS4B、pConNS5AまたはpConNS5Bで筋肉注射により免疫し、続いて電気穿孔を行った。
免疫が誘導したNS4B、NS5AおよびNS5Bに特異的なT細胞を、筋肉内免疫処置後の肝臓内で検出した
実施例1に上述されている通りにマウスを免疫した。最後の免疫から1週間後、これらの動物を屠殺した。屠殺後肝臓を単離し、Stomacher machineを用いてそれぞれ粉砕した。その結果得られた混合物を濾過し、10mlのACK溶解緩衝液(Bioscience)で5分間処置して、RBCを除去した。この混合物を沈殿させ、35%パーコールによる勾配を用いてリンパ球から肝細胞を分離した。沈殿させたリンパ球は完全培地中に再懸濁した。実験を、肝臓灌流を行う場合と行わない場合の両方で実行したが、両者に差異は観察されなかった。
3.4 肝細胞によるHCV抗原の肝特異的発現により、IFN−γ産生の増加およびトランスフェクトされた肝細胞のクリアランスが起こる
次に、NS4B、NS5AまたはNS5Bタンパク質のいずれかの肝特異的発現が、肝臓内で検出されるHCV特異的T細胞を活性化できるかどうかを判定しようと試みた。NS4B、NS5AおよびNS5Bの肝特異的発現を誘導するために、免疫したマウスの肝細胞を、Ahlen, G., et al., In vivo clearance of hepatitis C virus nonstructural 3/4A−expressing hepatocytes by DNA vaccine−primed cytotoxic T lymphocytes. J Infect Dis, 2005. 192(12):p. 2112−6で既に記載されたように、pConNS4B、pConNS5AまたはpConNS5Bのいずれかの尾静脈注射によりトランスフェクトした。肝臓を48時間トランスフェクトした後回収し、上の実施例3に記載される通り肝臓のリンパ球を単離した。前述の通り、免疫が誘導したHCV特異的T細胞を、細胞内サイトカイン染色およびフローサイトメトリーを介して検出したIFN−γ分泌により同定した。
脾細胞を、1×106細胞/100μlの濃度で完全培地中に再懸濁し、96ウェルプレートの丸型の底部にプレーティングした。脾細胞を、100μlの:いずれもGolgiStopおよびGolgiPlug (BD Bioscience)を追加した完全培地中に希釈された1)2μg/mlのpConNS4B、pConNS5AまたはpConNS5B重複ペプチド、2)1μg/mlのブドウ球菌エンテロトキシンB(陽性対照:Sigma−Aldrich, St. Louis, MO)または3)0.1%ジメチルスルホキシド(陰性対照)のいずれかで刺激した。脾細胞を37℃で合計5時間刺激した後、PBSで3回洗浄し、生存率を調べるために染色した。脾細胞を、表面マーカー;抗CD4、CD8に対し4℃で30分間細胞外染色した。その後脾細胞をBD Cytofix/Cytoperm Solution Kit(BD Bioscience)を用いて透過処理し、かつ洗浄し、それから抗IFN−γおよびCD3を用いて、4℃で45分間細胞内染色した。染色後、脾細胞を1%パラホルムアルデヒドで固定し、分析まで4℃で保存した。特異的機能を、各動物についてペプチド刺激群のパーセント関数から0.1%ジメチルスルホキシド刺激群(陰性対照)のパーセント関数を引いた値として記録した。
以下の直接コンジュゲートされる抗体を使用した:抗マウス CD3−アロフィコシアニンシアニン色素7(APC−Cy7)[clone 145−C11]、抗マウスCD4−フルオレセインイソチオシアネート(FITC)[clone H129.19]、抗マウス CD8−ペリディニンクロロフィルタンパク質5.5(PerCP5.5)[clone 53−6.7]、抗マウスIFN−γフィコエリトリン(phycoerythryin)シアニン色素7(PE−Cy7)[clone XMG1.2](全てBD Biosciences製、サンノゼ,CA)。肝細胞を同定するために、製造者のプロトコールにしたがって、Aqua Live/Dead fixable dead cell Stain Kit (Molecular Probes、ユージーン、OR)を使用した。
肝臓を切除し、生検を2%パラホルムアルデヒドで固定し、その後30%スクロース中で一晩凍結保護した。生検を、Tissue−Tek OCT (Bayer Corporation、ピッツバーグ、PA)中に浸し、ドライアイス窒素上の2−メチルブタン中で急速凍結した。Superfrost Plus glass slides (Fisher Scientific、ピッツバーグ、PA)上に置かれた組織切片(6μm)上で染色を実行し、使用するまで80℃で保存した。免疫蛍光染色を行う前に、スライドを室温に戻しリン酸緩衝塩溶液(PBS)で各10分間3回洗浄し、2次試薬が産生された種の10%の通常の血清および0.1%のトリトンを含むPBSにおいてブロックした。1次試薬を切片に適用し、室温で1時間または4℃で一晩インキュベートした。この切片を、PBSで各10分間3回洗浄し、必要である際には、2次試薬を室温で30分間適用した。この切片を再び、PBSで各10分間、3回洗浄した。カバーガラスを、Prolong Gold mounting media(Invitrogen、カールズバッドCA)で乗せ、スライドを試験および撮影まで暗所に4℃で保存した。すべての染色は湿度のある環境において実行した。使用した抗体は、Invitrogenあるいは抗体を製造する競合会社から入手した。全ての画像はZeiss Axiovert 100倒立共焦点顕微鏡を用いて得て、蛍光強度(florescence intensities)の分析および定量化は、Image Jソフトウェア(NIH、ロックビル、MD)を使用して行った。
Claims (12)
- 配列番号2のタンパク質をコードするコード配列を含む核酸分子。
- 前記核酸分子が、配列番号9の配列を有するIgEリーダーのコード配列が存在しない、請求項1に記載の核酸分子。
- a)配列番号1の配列を含む、請求項1に記載の核酸分子。
- 前記核酸分子が、IgEリーダーのコード配列が存在せず、前記存在しないコードが、配列番号7または配列番号8である、請求項3に記載の核酸分子。
- 前記核酸分子がプラスミドである、請求項1〜4のいずれか1項に記載の核酸分子。
- 前記核酸分子が、発現ベクターであり、かつ前記1つ以上のタンパク質をコードする配列が、調節エレメントに作動可能に連結する、請求項1〜5のいずれか1項に記載の核酸分子。
- HCVと診断された対象の治療のための、請求項1〜6のいずれか1項に記載の核酸分子を含む、医薬組成物。
- 配列番号2のタンパク質。
- 前記タンパク質中に、配列番号9の配列を有するIgEリーダーが存在しない、請求項8に記載のタンパク質。
- HCVと診断された対象の治療のための、請求項8または9に記載のタンパク質を含む、医薬組成物。
- 請求項1〜6のいずれか1項に記載の核酸分子および薬学的に許容可能な賦形剤を含む、薬学的組成物。
- 請求項8または9に記載のタンパク質および薬学的に許容可能な賦形剤を含む、薬学的組成物。
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AU2011380015B2 (en) | 2017-09-07 |
KR101679731B1 (ko) | 2016-11-25 |
KR20160084475A (ko) | 2016-07-13 |
CA3099156A1 (en) | 2013-05-02 |
KR101913674B1 (ko) | 2018-10-31 |
EP2771035A4 (en) | 2015-10-21 |
KR20150132885A (ko) | 2015-11-26 |
CN103889460A (zh) | 2014-06-25 |
AU2020213308B2 (en) | 2023-11-16 |
CA2851336C (en) | 2021-01-12 |
CN103889460B (zh) | 2016-06-15 |
EP2771035A1 (en) | 2014-09-03 |
JP2015502139A (ja) | 2015-01-22 |
CA2851336A1 (en) | 2013-05-02 |
KR101868954B1 (ko) | 2018-07-20 |
HK1198941A1 (en) | 2015-06-19 |
EP2771035B1 (en) | 2018-04-11 |
AU2020213308A1 (en) | 2020-08-27 |
KR20180069108A (ko) | 2018-06-22 |
AU2017272205A1 (en) | 2018-01-04 |
AU2011380015A1 (en) | 2014-04-24 |
KR20140084236A (ko) | 2014-07-04 |
AU2024201011A1 (en) | 2024-03-07 |
WO2013062507A1 (en) | 2013-05-02 |
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